Aggiunge bitrate adattivo con qualità minima da regia e telemetria del telefono.

L'encoder scende in congestione e risale piano; la regia imposta il pavimento, mostra lo stato del telefono e apre il selettore dal bitrate colorato.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/controllers/api/v1/stream_sessions_controller.rb

@@ -68,6 +68,7 @@ module Api
           current_bitrate: params[:current_bitrate],
           target_bitrate: params[:target_bitrate],
           fps: params[:fps],
+          thermal_state: sanitized_thermal_state,
           last_seen_at: Time.current
         )
         sync_publisher_when_streaming!(params[:fps].to_f)
@@ -141,6 +142,13 @@ module Api
         }
       end
 
+      def min_quality
+        Sessions::SetMinQuality.new(@session, preset: params[:min_quality_preset]).call
+        render json: session_json(@session)
+      rescue ArgumentError => e
+        render json: { error: e.message }, status: :unprocessable_entity
+      end
+
       def youtube_stats
         count = if @session.platform == "youtube" && @session.youtube_broadcast_id.present?
                   Youtube::BroadcastService.new(@session.match.team)
@@ -160,6 +168,11 @@ module Api
                                 .find(params[:id])
       end
 
+      def sanitized_thermal_state
+        value = params[:thermal_state].to_s.downcase.presence
+        value if value.in?(%w[nominal fair serious critical])
+      end
+
       def session_params
         params.permit(:platform, :privacy_status, :quality_preset, :target_bitrate, :target_fps, :youtube_channel)
       end
@@ -187,6 +200,7 @@ module Api
           youtube_ready: session.youtube_ready?,
           privacy_status: session.privacy_status,
           quality_preset: session.quality_preset,
+          min_quality_preset: session.min_quality_preset,
           target_bitrate: session.target_bitrate,
           started_at: session.started_at,
           disconnection_count: session.disconnection_count